Improvement in portable steam-engines



H. M. DURPHY.

PORTABLE STEAM-ENGINE. No.17Z,916. Patented Feb. 1, 1876 UNITED STATESPATENT OFFICE.

HENERY M. DURPHY, or ITHAOA, NEW YORK, ASSIGNOR TO; WILLIAMS BROTHERS,OF SAME PLACE. v

IMPROVEMENT IN PORTABLE STEAM-ENGINES.

Specification forming part of Letters Patent No. 172,916, dated February1, 1876; application filed October 21, 1875.

To an whom it may concern Be it known that I, HENERY MAR'IYN DUR- PHY,of. Ithaca, Tompkins county, New York, have invented certainImprovements in Running-Gear for Portable Steam-Engines, whichimprovements 1 have set forth in the follow.

ing specification, reference being had to the accompanying drawings.

My invention relates to several parts-first, to the double joint I makefor the front axle. .The rear ot' the carriage front or frame isdividedfor a broad attachment to the boiler, and is united into a singlebar at its front, where it is curved downward and rounded. In therounded part is a'cylindrical chamber, holding a cylindricalpintleorking-holt. An axle. flat in its middle, is in a slot in the lower endof the pintle, and is secured there by a transverse bolt and myimprovement here consists in the double joint thus made. Second, myinvention relates to making the screws which lift the main weight o theboiler and its attached parts off of the springs of the rear ,axle, asapart of the rear brackets, and consequently ever transported with them;and

V here my invention consists of the screw and bracket being madein onedevice or part.

Figure l is a side elevation .of my engine, partially sectional. Fig. 2is a front View of my frontaxlejoint, also partially sectional. Fig. 3is a' view of my screw device, in part sectional. I In Fig. 1, a is acylindrical upright boiler, with the iron frame or front b bent downwardat its forward end, and having at c the cram ping-joint, which is madeby a portion of the pintle d, which is in the chamber of the frame I),and which part of the pintle is secured by a key near its top, insertedthrough a hole in the side of the frame, the place for which is seen atd, Fig. 2. The pintle has two hear- I in gs in the chamber, one near theletter 0', Fig.

2, and the other near the letter d, Fig. 2. The flattened middle of theaxle e is held to the pintle d by the bolt f through it and the pintle.At gone of the two rear axle-bracketswhich are fast to the boiler -arethe springs i h, between the brackets and the axle-clips i, whichsprings are about their pintles Z. Screws k, turned by their heads k,are in threads cut in the outer ends ofthe brackets, and when turneddownward (see Fig. 3) on the topof the pintles l, which fit hollowsinthe screws, lift the weight-of the'boiler off of the springs, and thusthe springs can no longer act; and these springs are made useful intransportation, and are prevented from action when the engine isworking. v

The further parts, advantages, and uses of my invention are apparent tothose skilled in the art to which it appertains.

I claim I 1. A pintle-piece or joint structure between the frame b andthe axle e of a portable steamengine, consisting of the pintle d,chambered in the lower end of the frame I), and held in place by a boltor key through the top ofthe said pintle, which key turns on a shoulderin the said chamber, and of a slot in the lower end of the saidpintle-piece, which slotted part embraces the front and rear sides ofthe axle c, and-is held to the axle by a bolt through the axle and theslotted ends of the pintle-piece, as set forth.

2. I claim the lifting-screw 70, made as part of the bracket g, incombination with the spring h and spring-pintle 1, whereby the weight ofthe boiler and engine is lifted off of the transporting-springs! whenthe engine is at work, as set forth. I

HENERY MARTYN DURPHY.

Witnesses-z S. J. BARKER,

WM. G. KING.

